Humic acid assisted chemical synthesis of silver nanoparticles for inkjet printing of flexible circuits
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In this paper, humic acid (HA) was used as stabilizer to prepare silver nanoparticles (Ag NPs) by chemically reducing silver salts in water phase, which were employed to produce Ag NPs inks for inkjet printing conductive silver patterns. The obtained silver nanoparticles stabilized with HA (HA-Ag NPs) were all in spherical shape and the particle size was about 7–12 nm. By re-dispersing HA-Ag NPs in ultrapure water, conductive ink with excellent storage stability was prepared, which can be placed at room temperature for 30 days without any precipitation. The as-prepared HA-Ag NPs conductive ink was printed onto photopapers to fabricate conductive silver patterns with a domestic inkjet printer. The resistivity of the printed pattern could reach 135 μΩ cm after printed for 40 layers and sintered at 180 °C for 60 min. In addition, the printed conductive silver patterns could be integrated into a LED device or alarm apparatus, indicating it could be widely used in flexible printing electronics.
We acknowledge financial support from the National First-Class Discipline Program of Light Industry Technology and Engineering (LITE2018-19), MOE & SAFEA for the 111 Project (B13025) for financial support.
Compliance with ethical standards
Conflicts of interest
The authors declare that they have no conflicts of interest.
- 7.Y.Y. Hao, N. Zhang, J. Luo, X.Y. Liu, Tannic acid stabilized antioxidation copper nanoparticles in aqueous solution for application in conductive ink. J. Mater. Sci. 29(24), 20603–20606 (2018)Google Scholar
- 9.K. Jaakkola, H. Sandberg, M. Lahti, V. Ermolov, Near-Field UHF RFID transponder with a screen-printed graphene antenna. IEEE Trans. Comput. Pack. Manuf. 9(4), 616–623 (2019)Google Scholar
- 19.Q.F. Chen, G.H. Liu, G.X. Chen et al., Green synthesis of silver nanoparticles with glucose for conductivity enhancement of conductive ink. BioResources 12(1), 608–621 (2017)Google Scholar
- 20.M.C. Dang, T.M.D. Dang, E. Fribourg-Blanc, Silver nanoparticles ink synthesis for conductive patterns fabrication using inkjet printing technology. Adv. Nat. Sci. 6(1), 015003–015010 (2015)Google Scholar
- 26.Z. Wang, X.W. Liang, T. Zhao et al., Facile synthesis of monodisperse silver nanoparticles for screen printing conductive inks. J. Mater. Sci. 28(22), 16939–16947 (2017)Google Scholar